(A, B, E) Western blots show expression of BCL-2, MCL-1 and BIM in the indicated STAT5-silenced Ph+ ALL cell lines (A) and in the shSTAT5-BV173 derivative line transduced with the Doxy-regulated shBIM lentivirus (B), or in shSTAT5-BV173 ectopically expressing MCL-1 or BCL-2 (E, left), or in the shSTAT5-shBIM-BV173 line expressing MCL-1 or BCL-2 (E, right); (C, D) % of apoptotic cells detected by Annexin V staining in shSTAT5-BV173 parental and derivative cell lines, untreated or Doxy treated to silence STAT5 expression.